//#define _CRT_SECURE_NO_WARNINGS
//#include<stdio.h>
//char* my_strcpy(char* des, const char* src)
//{
//	char* ret = des;
//	while (*des++ = *src++);
//	return ret;
//}
//int main()
//{
//	char arr1[20] = "xxxxxxxxxxxxxxx";
//	char arr2[] = "abcd";
//	char* ret = my_strcpy(arr1, arr2);
//	printf("%s\n", ret);
//	return 0;
//}